The only way I think you can reset the interior is to have them leave and then move back to your island, but that will reset friendship with them too :c
I let my friend adopt one of my villagers and they kept some of the things I gave them when he moved to my friend's island. Will that not be the case if I tried to move a villager again?
This isnt true.THE USER MUST BE A FRIEND ON THE SWITCH.
I think they meant if they move the SAME villager back. Like, literally the same. Back from their friend's island.When you give away a villager and then get them back from an island/campsite they act like they never knew you, so I don't think that should be the case.